Packaged product with a foil wrapper having a perforation for opening the foil wrapper

ABSTRACT

In a packaged product ( 1 ) including a non-packaged product ( 2 ), including container ( 3 ) and a foil wrapper ( 13 ) which wholly envelops the container ( 3 ) together with the non-packaged product ( 2 ) accommodated therein the foil wrapper ( 13 ) is made of a heat-shrinkable foil ( 14 ) and the foil wrapper ( 13 ) only has perforation holes ( 19 ) forming a perforation ( 18 ) in its area which lies against the a container wall ( 4, 5, 8 ), and the foil wrapper ( 13 ) has no perforation holes in its area which covers an opening ( 10 ) in the container ( 3 ).

BACKGROUND OF THE INVENTION

The invention relates to a packaged product including a non-packagedproduct and including a container which accommodates the non-packagedproduct and which has at least one container wall and at least oneopening which allows access to the non-packaged product, and including afoil wrapper which wholly envelops the container together with thenon-packaged product accommodated therein and which lies against the atleast one wall and covers the opening in the container and is made of aheat-shrinkable foil and has been provided with a perforation whichcomprises a succession of adjacent perforation holes and extends over agiven circumferential portion of the packaged product, which perforationextends parallel to a cross-sectional zone of the container, thecross-sectional zone extending across the opening in the container.

Such a packaged product of the type defined in the opening paragraph hasbeen put onto the market by the Applicant and is consequently known. Theknown packaged product includes a magnetic-tape cassette as non-packagedproduct, which cassette is accommodated in a book-cover type containerhaving two main walls, two short side walls and one long side wall andhaving no wall in the area of the narrow side opposite the long sidewall, in which area it has the opening for access to the magnetic-tapecassette. The book-cover type container together with the magnetic-tapecassette contained therein is enclosed in a foil wrapper of aheat-shrinkable foil. The foil wrapper of the known packaged product hasa perforation for easy opening of the foil wrapper, the perforationbeing situated in a cross-sectional plane of the container, which planeextends parallel to the two short side walls of the container, andextending over both main walls of the container as well as over the longside wall of the container and over the container opening which facesthe one long side wall of the container. As a result of this design ofthe perforation the perforation extends not only in areas in which theheat-shrinkable foil lies against the walls of the container but also inthe area in which the perforation lies across the opening in thecontainer. In this area the inner side of the heat-shrinkable foil doesnot lie against a container wall but extends freely at a small distancefrom the magnetic-tape cassette in the container. Owing to the designdescribed above the known packaged product exhibits the problem thatduring the heat shrinking process, in which the sealed foil wrappedaround the container including the magnetic-tape cassette is subjectedto shrinking under the influence of heat, the foil is likely to be tornopen inadvertently in the area where the perforation extends across theopening in the container, which not only detracts from the appearancebut which is particularly unfavorable because it readily allows theingress of dust and liquid or at least moisture into the interior of thepackaged product at the torn-open spots, which is disadvantageous andtherefore undesirable.

SUMMARY OF THE INVENTION

It is an object of the invention to preclude the afore-mentionedproblems and to provide an improved packaged product for which tearingopen of the perforation as a result of heat-shrinking of theheat-shrinkable foil has been precluded.

According to the invention, in order to achieve this object with apackaged product of the type defined in the opening paragraph the foilwrapper only has perforation holes forming the perforation in its areawhich lies against the at least one container wall, and the foil wrapperhas no perforation holes in its area which covers the opening in thecontainer.

By taking the measures in accordance with the invention it is achievedin a very simple manner that the perforation of a packaged product inaccordance with the invention extends only in those areas where theheat-shrinkable foil lies directly against a wall of the container ofthe packaged product, which has the advantage that during aheat-shrinking process the heat applied to the foil in the area of theperforation can readily be transferred to the underlying walls of thecontainer, as a result of which the perforation is not subjected to anysignificant mechanical loads resulting from the application of heat and,consequently, no undesired tearing open of the foil along theperforation in the areas in which the perforation directly adjoins thecontainer walls underneath it, and which further has the advantage thatthere is no perforation at all in the foil area which extends over theopening in the container, as a result of which tearing open along aperforation is neither possible in this area.

In a packaged product in accordance with the invention the perforationmay extend up to a location directly at the edge of the opening in thecontainer. However, it has proved to be advantageous if the length ofthe part of the foil wrapper without perforation holes is greater thanthe dimension of the opening in the container in the area covered by thepart of the foil wrapper not having any perforation holes, because as aresult of this the likelihood that the foils is not torn open in itsarea which covers the opening is particularly great.

A packaged product in accordance with the invention may include forexample as non-packaged product a perfume bottle accommodated in acontainer in the form of a folding box, the folding box having at leastone opening to display the perfume bottle. A multitude of furthervariants of the packaged product in accordance with the invention arepossible. It has proved to be particularly advantageous if a packagedproduct in accordance with the invention is defined by a box holding amagnetic tape cassette, wherein the box includes two main walls, twoshort side walls, one long side wall, and one long side opening.

The above-mentioned as well as further aspects of the invention willbecome apparent from the embodiment described hereinafter by way ofexample and will be elucidated with reference to this example.

BRIEF DESCRIPTION OF THE DRAWING

The invention will now be described in more detail with reference to thedrawing, which show an embodiment given by way of example but to whichthe invention is not limited.

FIG. 1 is an oblique plan view of a packaged product in accordance withand embodiment of the invention, which packaged product includes a foilwrapper of a heat-shrinkable foil.

FIG. 2 is a plan view of the heat-shrinkable foil of the foil wrapper ofthe packaged product shown in FIG. 1.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

FIG. 1 shows a packaged product 1 which includes a magnetic-tapecassette 2 as a non-packaged commercially available product. Themagnetic-tape cassette 2 is box-shaped and is accommodated in acontainer 3. The container 3 has a first main wall 4, a second main wall5, a first short side wall 6, a second short side wall 7 and a long sidewall 8. The container 3 does not have a wall in the area of the narrowside 9 opposite the long side wall 8, in which area the container has anopening 10. The opening 10 provides access to the magnetic-tape cassette2. In order to facilitate removal of the cassette 2 from the container 3and replacing it into the container 3 the opening 10 has a recedingportion, 11 or 12, in the area of each of the two main walls 4 and 5,respectively.

The packaged product 1 has further been provided with a foil wrapper 13which wholly encloses the container 3 together with the magnetic-tapecassette 2 accommodated therein and which fits tautly around thecontainer walls 4, 5, 6, 7 and 8 and which further covers the opening 10in the container 3. The foil wrapper 13 comprises a heat-shrinkable foil14, shown in FIG. 2, which is transparent in the present case but whichmay also be provided with print and may thus be opaque.

During the manufacture of the packaged product 1 the foil 14 is cut froma long web of foil and is the wrapped around the container 3 includingthe cassette 2, after which the foil 14 is subsequently heat-sealed inthe area of a sealing zone 15 shown as a dash-dot line in FIG. 1 andsituated in the area of the end portions which overlap after said foilhas been wrapped around the container 3, and after sealing along thesealing zone 15 the foil 14 is folded in the areas of the short sidewalls 6 and 7 of the container 3 and is also sealed along sealing zones16 and 17. Subsequently, the packaged product 1 is passed through aheating station, in which a heat treatment is carried out, as a resultof which the heat-shrinkable foil 14 shrinks in comparison with itsinitial condition and consequently lies tautly against all the walls 4,5, 6, 7 and 8 of the container 3. This heat-shrinking of the foil 14further causes the foil 14 to cover the opening 10 of the container 3 ina taut condition.

The foil wrapper 13 and, consequently, the heat-shrinkable foil 14 areprovided with a perforation 14 so as to allow easy opening of the foilwrapper 13, which perforation comprises a succession of adjacentperforation holes 19 formed by cuts made, for example, by means of atoothed cutter wheel. The perforation holes 19, which are slit-shaped inthe present case but which may alternatively have a circular or ovalshape, have foil portions 20 between them. The perforation 18 extendsover a given circumferential portion of the packaged product 1, as willbe described in more detail hereinafter. The perforation 18 extendsparallel to a cross-sectional zone of the container 3, thecross-sectional zone extending across the opening 10 in the container 3.In the present case, the cross-sectional zone is representeddiagrammatically as a cross-sectional plane 21 in FIG. 1, which extendsparallel to the two short side walls 6 and 7 of the container 3.However, the cross-sectional zone may alternatively be curved.

Advantageously, the perforation 18 for the packaged product 1 is made insuch a manner that the foil wrapper 13 only has perforation holes 19 inits area where it lies against the container walls 4, 5 and 8 and thatin the area which covers the opening 10 in the container 3 the foilwrapper 13 is without perforation holes. An additional advantageousmeasure is that the length L1 (see FIG. 2) of the part of the foilwrapper 13 without perforation holes is greater than the dimension L2(see FIG. 1) of the opening 10 in the area covered by the non-perforatedpart of the foil wrapper 13. As a result of this advantageous design theperforation 18 extends over a large part of the two main walls 4 and 5of the container 3 and over the long side wall 8 of the container 3.However, the perforation 18 does not extend up to the edge of the mainwall 4 or 5 which adjoins the narrow side 9 of the container 3.

As a result of the advantageous design of the foil wrapper 13 it isachieved that during heat-shrinking of the foil wrapper 13 and, as aconsequence, the foil 14 no undesired tearing open of the foil 14 alongthe perforation 18 takes place and, consequently, no undesired tearingof the foil 14 in its non-perforated area which covers the opening 10 inthe container 3.

What is claimed is:
 1. A packaged product comprising: a non-packagedproduct; a container that accommodates the non-packaged product, has atleast one container wall, and has at least one opening that allowsaccess to the non-packaged product; and a foil wrapper that whollyenvelops the container together with the non-packaged productaccommodated therein, lies against the at least one wall, covers theopening in the container, is made of a heat-shrinkable foil, and hasbeen provided with a perforation that includes a succession of adjacentperforation holes and extends over a given circumferential portion ofthe packaged product, which perforation extends parallel to across-sectional zone of the container, the cross-sectional zoneextending across the opening in the container, wherein: the foil wrapperonly has perforation holes forming the perforation in its area whichlies against the at least one container wall; the foil wrapper has noperforation holes in its area which covers the opening in the container;the length of the part of the foil wrapper without perforation holes isgreater than the dimension of the opening in the container in the areacovered by the part of the foil wrapper not having any perforationholes; the non-packaged product is formed by a magnetic-tape cassettehaving a box-shaped housing; the container is of the book-cover type,has two main walls, two short side walls, and one long side wall, anddoes not have a wall in the area of the long narrow side opposite thelong side wall, in which area it has the opening for access to themagnetic-tape cassette accommodated in the book-cover type container asnon-packaged product; and the perforation extends in a cross-sectionalplane of the container, which plane extends parallel to the two shortside walls and extends over a large part of the two main walls of thecontainer and over the long side wall of the container.